If an individual needed remote access to a single computer andВ administrators don't wish to exposeВ their network toВ someone'sВ home computer directly, then the best method is a remote access solution such as logmein, team viewer, screenconnect, etc. In both of these cases, it requires the person administrating the network to create the VPN structure on the corporate network to allow this to happen. This gives them the ability to access only some resources from off site. Again this involves the network administrator configuring the corporate firewall/router to allow an SSL vpn, they configure user accounts and then set up permissions for what IP addresses and ports that user has access to. For example, mobile employees needing access to company networks while they are not in the office. SSL VPN's are often used for single user connections to a network. In the firewall or router on each end, you configure the parameters for how these networks communicate, which involve the encryption key, and strength and authentication methods. For example, you have 2 locations, the first network is 10.10.10.x and the second is 10.10.20.x and you want computers/servers between these 2 locations to be able to talk to each other. IPSEC vpn's are often used for connecting 2 complete networks together.

A VPN is a connection between 2 end points that creates a secure encrypted tunnel.

How to create a free vpn tunnel